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Finding the Fourth Proportional to 957.42, 1,322.53 and 859.01

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Solution

The fourth proportional to 957.42, 1,322.53 and 859.01 is: 1,186.58

Step by Step Solution

  1. Step 1: Write the proportion equation
    957.42 : 1,322.53 = 859.01 : x
  2. Step 2: Convert to fraction form
    957.42/1,322.53 = 859.01/x
  3. Step 3: Cross multiply
    957.42x = 1,322.53 × 859.01
  4. Step 4: Simplify right side
    957.42x = 1,136,057.74
  5. Step 5: Solve for x
    x = 1,136,057.74/957.42
  6. Step 6: Final answer
    x = 1,186.58

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Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.